Resting atop the Trident II missile, the W88 warhead is among the mainstays of the country's submarine-based nuclear arsenal. For years, however, testing the warhead's components to ensure the weapon produces the intended blast instead of a fizzle has been complicated by a lack of replacement plutonium triggers.

Resting atop the Trident II missile, the W88 warhead is among the mainstays of the country's submarine-based nuclear arsenal. For years, however, testing the warhead's components to ensure the weapon produces the intended blast instead of a fizzle has been complicated by a lack of replacement plutonium triggers.

Fed-up lawmakers on a House oversight committee said Tuesday they want to strip a federal nuclear agency of its security responsibilities and threatened to shut down Los Alamos National Laboratory to correct a decade of security lapses there.

Authorities in northern New Mexico have stumbled onto what appears to be classified information from Los Alamos National Laboratory while arresting a man suspected of domestic violence and dealing methamphetamine from his mobile home.

The Federal Emergency Management Agency failed to set cost controls on hotel room rentals for Hurricane Katrina evacuees, an omission that led to "excessive" bills on some rooms, according to a new oversight report.